LAR_Maintenance/app/Models/MaintenanceHistory.php

<?php

namespace App\Models;

use App\Observers\MaintenanceHistoryObserver;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class MaintenanceHistory extends Model
{
    use HasFactory;

    protected $fillable = [
        'maintenance_id',
        'start_at',
        'finished_at',
        'guestor_id',
    ];

    protected $casts = [
        'start_at' => 'datetime',
        'finished_at' => 'datetime',
    ];

    protected static function booted()
    {
        MaintenanceHistory::observe(MaintenanceHistoryObserver::class);
    }

    public function maintenance()
    {
        return $this->BelongsTo(Maintenance::class);
    }

    public function historyHosts()
    {
        return $this->hasMany(MaintenanceHostHistory::class);
    }

    public function guestor()
    {
        return $this->BelongsTo(User::class, 'guestor_id');
    }
}